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/*
* Copyright (C) 2019 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.settings.accessibility;
import android.content.ContentResolver;
import android.content.Context;
import android.content.res.Resources;
import android.provider.Settings;
import android.view.View;
import android.view.accessibility.AccessibilityManager;
import androidx.lifecycle.LifecycleObserver;
import androidx.preference.Preference;
import androidx.preference.PreferenceScreen;
import com.android.settings.R;
import com.android.settings.core.BasePreferenceController;
import com.android.settingslib.core.lifecycle.Lifecycle;
import com.android.settingslib.widget.RadioButtonPreference;
import com.google.common.primitives.Ints;
import java.util.HashMap;
import java.util.Map;
/** Controller class that control radio button of accessibility daltonizer settings. */
public class DaltonizerRadioButtonPreferenceController extends BasePreferenceController implements
LifecycleObserver, RadioButtonPreference.OnClickListener {
private static final String TYPE = Settings.Secure.ACCESSIBILITY_DISPLAY_DALTONIZER;
// pair the preference key and daltonizer value.
private final Map<String, Integer> mAccessibilityDaltonizerKeyToValueMap = new HashMap<>();
// RadioButtonPreference key, each preference represent a daltonizer value.
private final ContentResolver mContentResolver;
private final Resources mResources;
private DaltonizerRadioButtonPreferenceController.OnChangeListener mOnChangeListener;
private RadioButtonPreference mPreference;
private int mAccessibilityDaltonizerValue;
public DaltonizerRadioButtonPreferenceController(Context context, String preferenceKey) {
super(context, preferenceKey);
mContentResolver = context.getContentResolver();
mResources = context.getResources();
}
public DaltonizerRadioButtonPreferenceController(Context context, Lifecycle lifecycle,
String preferenceKey) {
super(context, preferenceKey);
mContentResolver = context.getContentResolver();
mResources = context.getResources();
if (lifecycle != null) {
lifecycle.addObserver(this);
}
}
protected static int getSecureAccessibilityDaltonizerValue(ContentResolver resolver,
String name) {
final String daltonizerStringValue = Settings.Secure.getString(resolver, name);
if (daltonizerStringValue == null) {
return AccessibilityManager.DALTONIZER_CORRECT_DEUTERANOMALY;
}
final Integer daltonizerIntValue = Ints.tryParse(daltonizerStringValue);
return daltonizerIntValue == null ? AccessibilityManager.DALTONIZER_CORRECT_DEUTERANOMALY
: daltonizerIntValue;
}
public void setOnChangeListener(
DaltonizerRadioButtonPreferenceController.OnChangeListener listener) {
mOnChangeListener = listener;
}
private Map<String, Integer> getDaltonizerValueToKeyMap() {
if (mAccessibilityDaltonizerKeyToValueMap.size() == 0) {
final String[] daltonizerKeys = mResources.getStringArray(
R.array.daltonizer_mode_keys);
final int[] daltonizerValues = mResources.getIntArray(
R.array.daltonizer_type_values);
final int daltonizerValueCount = daltonizerValues.length;
for (int i = 0; i < daltonizerValueCount; i++) {
mAccessibilityDaltonizerKeyToValueMap.put(daltonizerKeys[i], daltonizerValues[i]);
}
}
return mAccessibilityDaltonizerKeyToValueMap;
}
private void putSecureString(String name, String value) {
Settings.Secure.putString(mContentResolver, name, value);
}
private void handlePreferenceChange(String value) {
putSecureString(TYPE, value);
}
@Override
public int getAvailabilityStatus() {
return AVAILABLE;
}
@Override
public void displayPreference(PreferenceScreen screen) {
super.displayPreference(screen);
mPreference = (RadioButtonPreference)
screen.findPreference(getPreferenceKey());
mPreference.setOnClickListener(this);
mPreference.setAppendixVisibility(View.GONE);
updateState(mPreference);
}
@Override
public void onRadioButtonClicked(RadioButtonPreference preference) {
final int value = getDaltonizerValueToKeyMap().get(mPreferenceKey);
handlePreferenceChange(String.valueOf(value));
if (mOnChangeListener != null) {
mOnChangeListener.onCheckedChanged(mPreference);
}
}
private int getAccessibilityDaltonizerValue() {
final int daltonizerValue = getSecureAccessibilityDaltonizerValue(mContentResolver,
TYPE);
return daltonizerValue;
}
protected void updatePreferenceCheckedState(int value) {
if (mAccessibilityDaltonizerValue == value) {
mPreference.setChecked(true);
}
}
@Override
public void updateState(Preference preference) {
super.updateState(preference);
mAccessibilityDaltonizerValue = getAccessibilityDaltonizerValue();
// reset RadioButton
mPreference.setChecked(false);
final int preferenceValue = getDaltonizerValueToKeyMap().get(mPreference.getKey());
updatePreferenceCheckedState(preferenceValue);
}
/** Listener interface handles checked event. */
public interface OnChangeListener {
/** A hook that is called when preference checked. */
void onCheckedChanged(Preference preference);
}
}
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